//: holding/EnvironmentVariables.java
package holding;
import java.util.*;

public class EnvironmentVariables {
  public static void main(String[] args) {
    //System.getenv()返回一个系统环境变量的map
    for(Map.Entry entry: System.getenv().entrySet()) {
      System.out.println(entry.getKey() + ": " +
        entry.getValue());
    }
    String[] a = {"asd","assd","eere"};
    for (String b :a){
      System.out.println(b);
    }
  }
} /* (Execute to see output) *///:~
